Miniature rose plant named ‘KORaroma05’

ABSTRACT

‘KORaroma05’ is a new and distinct variety of  Rosa hybrida  which is characterized by the combination of a compact growth habit with a moderately vigorous rate of growth, above average resistance to many rose diseases, solitary pastel pink flowers, double flowers, and strongly fragrant flowers. The new variety propagates successfully by stem cuttings and grafting and has shown to be uniform and stable in the resulting generations from asexual propagation.

Latin name of genus and species: The Latin name of the genus and speciesof the novel variety disclosed herein is Rosa hybrida.

Variety denomination:

The inventive variety of Rosa hybrida disclosed herein has been giventhe variety denomination ‘KORaroma05’.

STATEMENT REGARDING PRIOR DISCLOSURES BY THE INVENTOR UNDER 37 C.F.R.1.77(B)(6)

The first public disclosure of the claimed plant was made in January of2016 at the 2016 IPM horticulture tradeshow in Essen, Germany where itwas displayed by the inventor amongst a collection of other rosecultivars. The claimed plant was not specifically identified by name inthe display. ‘KORaroma05’ was not publically available or sold prior toone year before the date of the instant application.

BACKGROUND OF THE INVENTION

Parentage: The Rosa hybrida variety ‘KORaroma05’ is the result of acontrolled cross-pollination breeding program carried out by theinventor in Klein Offenseth-Sparrieshoop, Germany. The objective of thesaid breeding program was to create a new and distinct rose plant withunique qualities, such as:

-   -   1. A compact growth habit and uniform flowering when grown as a        potted floral plant; and    -   2. Abundant, long-lasting, fragrant and recurrent pastel pink        flowers; and    -   3. Attractive foliage; and    -   4. Resistance to diseases encountered in greenhouse and nursery        culture.        This combination of qualities is not present in prior rose        cultivars known to the inventor. These objectives have been        substantially achieved and in that distinguish ‘KORaroma05’ from        all other varieties known to the inventor.

‘KORaroma05’ is a seedling selection which resulted from the controlledpollination of an unnamed Rosa hybrida seedling developed and owned bythe same inventor (not protected), the seed parent, with a secondunnamed Rosa hybrida seedling developed and owned by the same inventor(not protected), the pollen parent, during the summer of 2012. As partof a rose development program, Tim-Hermann Kordes germinated seeds fromthe aforementioned hybridization during the following winter andconducted evaluations and observations on the resulting seedlings in acontrolled environment in Klein Offenseth-Sparrieshoop, Germany. Theresulting seedlings exhibited distinctive physical and biologicalcharacteristics. The new rose plant was selected as a single plant inMay of 2013 from the seedling beds due to its superior characteristicsand asexually propagated for further evaluation. This new anddistinctive rose variety was given the name ‘KORaroma05’.

Asexual Reproduction: ‘KORaroma05’ was first asexually propagated byrooting vegetative cuttings in June of 2013 at the inventor's nursery inKlein Offenseth-Sparrieshoop, Germany. Subsequently, ‘KORaroma05’ hasbeen successfully propagated by stem cuttings in Jackson County, Oreg.These initial and other subsequent propagations conducted in controlledenvironments demonstrate that ‘KORaroma05’ reproduces true to type insuccessive generations of asexual reproduction.

SUMMARY OF THE INVENTION

The following characteristics have been repeatedly observed andrepresent the distinguishing characteristics of the new Rosa hybridacultivar ‘KORaroma05’. These traits, in combination, distinguish‘KORaroma05’ as a new and distinct cultivar.

-   -   1. Rosa hybrida ‘KORaroma05’ exhibits a moderately vigorous        growth rate; and    -   2. Rosa hybrida ‘KORaroma05’ exhibits a compact growth habit;        and    -   3. Rosa hybrida ‘KORaroma05’ exhibits above average resistance        to powdery mildew and Botrytis diseases; and    -   4. Rosa hybrida ‘KORaroma05’ exhibits solitary pastel pink        flowers which are held upright; and    -   5. Rosa hybrida ‘KORaroma05’ exhibits double flowers of a medium        size for a miniature rose; and    -   6. Rosa hybrida ‘KORaroma05’ exhibits flowers with strong        fragrance.

BRIEF DESCRIPTION OF THE DRAWING

The accompanying color drawing shows as true as is reasonably possibleto obtain in color photographs of this type, the typical characteristicsof the buds, sepals, reproductive organs, flowers, leaves, prickles, andstems of ‘KORaroma05’, taken from a one year old plant.

DETAILED BOTANICAL DESCRIPTION

The following is a detailed botanical description of a new and distinctvariety of Rosa hybrida known as ‘KORaroma05’, based upon observationsmade in October of 2016 from one year old, greenhouse-grown containerplants in Jackson County, Oreg. Those skilled in the art will appreciatethat certain characteristics will vary with older or, conversely, withyounger plants. ‘KORaroma05’ has not been observed under all possibleenvironmental conditions. Where dimensions, sizes, colors and othercharacteristics are given, it is to be understood that suchcharacteristics are approximations or averages set forth as accuratelyas practicable. The phenotype of the variety may differ from thedescriptions set forth herein with variations in environmental, climaticand cultural conditions. Color notations are based on The RoyalHorticultural Society Colour Chart, The Royal Horticultural Society,London, 2001 edition except where common terms of color are used.

A botanical description of ‘KORaroma05’ and comparisons with the parentsand closest known comparator variety of Rosa hybrida are provided below.

-   General plant description:    -   -   Growth rate.—Moderately vigorous.        -   Growth habit.—Compact.        -   Mature dimensions.—25 cm tall and 20 cm wide, when grown as            a 10 to 15 cm pot plant.        -   Cold hardiness.—Unknown.        -   Propagation.—Stem cuttings and bud grafting.        -   Disease resistance.—Above average resistance to powdery            mildew (Sphaerotheca pannosa) and Botrytis sp. diseases            under normal greenhouse growing conditions in Jackson            County, Oreg.-   Root system:    -   -   Type.—Fibrous root system, with many root hairs.        -   Branching.—Moderately branched.        -   Density.—Moderately dense.        -   Distribution.—Roots distributed evenly throughout the soil            profile, from shallow to deep.-   Stems:    -   -   Stem color.—Young stems are Yellow-Green Group 146A; mature            stems are Yellow-Green Group 146A.        -   Anthocyanin intonations.—Intonations of Greyed-Purple Group            183C are limited to the distalmost portion of the juvenile            stems, below inflorescences.        -   Stem surface texture.—Both young stems and mature stems are            smooth.        -   Stem dimensions.—Typical mature stems are approximately 10            to 20 cm long and 2.0 to 4.0 mm in diameter.        -   Prickles.—Incidence — Typically 1 to 3 prickles per 10 cm of            stem, on average. Size — Average length is 2.0 to 3.0 mm            long. Immature prickle color — Greyed-Purple Group 184B and            suffused with Greyed-Purple Group 183B. Mature prickle color            — Greyed-Purple Group 183C and senescing to Greyed-Brown            Group N199D. Shape — Concave. Texture — Smooth.-   Leaves:    -   -   Arrangement.—Imparipinnate compound leaves; mature axillary            leaves typically with 5 leaflets on normal leaves in the            middle of the stems.        -   Attachment.—Petiolate.        -   Dimensions.—95 to 110 mm long and 73 to 86 mm wide.        -   Abundance.—Very abundant; normally with 25 to 30 leaves.        -   Stipules.—Size — 11 mm long and 6.0 to 7.0 mm wide. Stipule            color — Yellow-Green Group 146B. Anthocyanin intonations —            Greyed-Purple Group 183C; mostly present on juvenile            foliage. Stipitate glands — Abundant along the margins.            Margins — With stipitate glands. Texture, adaxial surfaces —            Lightly pubescent. Texture, abaxial surfaces — Glabrous.            Apex — Aristate. Base — Fused to the petiole.        -   Petiole.—Length — Average 11 to 12 mm. Diameter — Average            1.0 mm. Petiole color, adaxial surface — Yellow-Green Group            146B. Petiole color, abaxial surface — Yellow-Green Group            146B. Anthocyanin intonations — Greyed-Purple Group 184C on            juvenile foliage; the presence of Greyed-Purple Group 184C            intonations is variable on mature foliage. Margins — With a            limited number of stipitate glands. Prickles — None present.            Stipitate glands — Variable; ranging from a limited number            of glands to moderately abundant. Texture — Lightly            pubescent. Strength — Strong.        -   Rachis.—Length — Average 17 to 18 mm. Diameter — Average            1.0 mm. Color — Yellow-Green Group 146B. Anthocyanin            intonations — Greyed-Purple Group 183C on juvenile foliage;            the presence of Greyed-Purple Group 183C intonations is            variable on mature foliage. Margins — With a limited number            of stipitate glands. Prickles — A few small prickles on the            abaxial surface. Stipitate glands — A limited number of            stipitate glands are present along the margins. Texture —            Glabrous.        -   Leaflets.—Dimensions — Average size of the terminal leaflet            is 39 to 51 mm long and 20 to 25 mm wide. Shape — Ovate.            Apex — Acute. Base — Obtuse. Margins — Finely serrated; no            undulation. Texture, pubescence, and luster; adaxial surface            — Leathery, glabrous, and semi-glossy. Texture, pubescence,            and luster; abaxial surface — Leathery, glabrous, and matte.            Stipitate glands — A limited number of stipitate glands are            present along the abaxial midrib and margins. Juvenile            foliage color, adaxial surface — Yellow-Green Group 147A.            Juvenile foliage color, abaxial surface — Yellow-Green Group            147B. Mature foliage color, adaxial surface — Yellow-Green            Group 147A. Mature foliage color, abaxial surface —            Yellow-Green Group 147B. Anthocyanin intonations —            Intonations of Greyed-Purple Group 183C are present on the            adaxial and abaxial surfaces of the juvenile foliage, and            also at and near margins of mature foliage. Venation —            Reticulate. Petiolule — Dimensions — 2.0 mm long and 1.0 mm            in diameter. Petiolule color, adaxial surface — Yellow-Green            Group 147B. Petiolule color, abaxial surface — Yellow-Green            Group 147B. Prickles — None observed. Margins — A few            stipitate glands are present. Texture, adaxial surface —            Smooth. Texture, abaxial surface — Smooth.-   Inflorescence:    -   -   Inflorescence type.—Flowers are solitary. Flowers are held            upright.        -   Blooming habit.—Recurrent.        -   Size.—140 mm tall and 60 mm wide, on average.-   Flowering laterals: Present below the initiation of inflorescence.    Generally 1 flowering lateral is present, with 1 flower per    flowering shoot.-   Flower bud:    -   -   Bud form.—Long; pointed ovoid to high centered.        -   Size.—Upon opening, 38 mm in length from base of receptacle            to distal end of bud and 12 to 14 mm diameter at its widest            point.        -   Texture.—Smooth.        -   Color, as sepals first unfold.—Red-Purple Group 61C.        -   Color when one-quarter open, inner side.—Marginal Zone —            Red-Purple Group N66A. Middle Zone — Nearest to a            combination of Red-Purple Group 63D and Red-Purple Group            N66A. Basal Zone — Nearest to a combination of Red-Purple            Group 63D and Red-Purple Group N66A.        -   Color when one-quarter open, outer side.—Marginal Zone —            Red-Purple Group N66A. Middle Zone — Red-Purple Group N66A.            Basal Zone — Red-Purple Group N66A.-   Flower:    -   -   Peduncle.—Length — 30 to 40 mm average length. Diameter —            1.0 to 2.0 mm average diameter. Color — Yellow-Green Group            146A. Anthocyanin intonations — Greyed-Purple Group 183B.            Strength — Somewhat strong. Surface — Smooth with fine hairs            and stipitate glands.        -   Calyx.—General — Comprised of five polysepalous sepals, with            weak foliaceous appendages present on three sepals. Diameter            of calyx — 65 to 70 mm, at anthesis. Sepals — Color, upper            surface — Yellow-Green Group 144A. Color, lower surface —            Yellow-Green Group 144A. Anthocyanin intonations —            Greyed-Purple Group 183B present at the apex of foliaceous            appendages and variable along the abaxial midrib. Size — 30            mm long and 6 to 11 mm wide, on average. Apex — Apiculate.            Base — Flat at union with receptacle. Quantity — Five. Upper            surface — Lightly pubescent. Lower surface — Smooth. Margins            — Pubescent; stipitate glands are present. Stipitate glands,            occurrence — Limited.        -   Corolla.—Conformation — Double. General shape of corolla —            Round. Shape of corolla when viewed from the side — Upon            opening, upper portion — Flat. Upon opening, lower portion —            Flattened convex. Open flower, upper portion — Flat. Open            flower, lower portion — Flattened convex. Dimensions —            Medium size for a miniature rose. When open, the average            flower diameter is 55 to 60 mm and the average flower height            is 30 to 35 mm. Fragrance — Strong. Duration — On the plant            for 12 to 14 days. Senesced petals drop away cleanly. Petals            — Petal count — Exhibits double flowers with an average of            25 petals under normal conditions. Petal reflex — Petals are            slightly reflexed. Timing of petal reflex — One by one.            Petal margin — Entire; not undulated. Petal shape — Obovate.            Apex — Obtuse. Base — Obtuse. Dimensions — 27 to 34 mm long            and 16 to 33 mm wide. Texture, inner surface — Smooth.            Texture, outer surface — Smooth. Petal color, upon opening —            Outermost petals, inner surface — Marginal Zone — Red-Purple            Group N66A. Middle Zone — Nearest to a combination of            Red-Purple Group 63D and Red-Purple Group N66A. Basal Zone —            Nearest to a combination of Red-Purple Group 63D and            Red-Purple Group N66A. Outermost petals, outer surface —            Marginal Zone — Red-Purple Group N66A. Middle Zone —            Red-Purple Group N66A. Basal Zone — Red-Purple Group N66A.            Innermost petals, inner surface — Marginal Zone — Red-Purple            Group 63C. Middle Zone — Nearest to a combination of            Red-Purple Group 63C and Orange-White Group 159D. Basal Zone            — Nearest to a combination of Red-Purple Group 63C and            Orange-White Group 159D. Innermost petals, outer surface —            Marginal Zone — Red-Purple Group 63C. Middle Zone —            Red-Purple Group 63C. Basal Zone — Red-Purple Group 63B.            Basal petal spots, upon opening — No distinctive coloration            at the petal base. Petal color, after opening — Outermost            petals, inner surface — Marginal Zone — Red-Purple Group            63B. Middle Zone — Red-Purple Group 63C. Basal Zone —            Red-Purple Group 63C. Outermost petals, outer surface —            Marginal Zone — Red-Purple Group 63B. Middle Zone —            Red-Purple Group 63B. Basal Zone — Red-Purple Group 63B.            Innermost petals, inner surface — Marginal Zone — Red-Purple            Group 63D. Middle Zone — Nearest to a combination of            Red-Purple Group 63D and Orange-White Group 159D. Basal Zone            — Nearest to a combination of Red-Purple Group 63D and            Orange-White Group 159D. Innermost petals, outer surface —            Marginal Zone — Red-Purple Group 63D. Middle Zone —            Red-Purple Group 63D. Basal Zone — Red-Purple Group 63B.            Basal petal spots, after opening — No distinctive coloration            at the petal base. General Tonality — On open flower,            Red-Purple Group N66A. No change in general tonality at the            end of the fourth day; thereafter the general tonality is            Red-Purple Group 63C. Petaloids — Quantity — 8 petaloids per            flower, on average. Dimensions — Variable; approximately 20            to 22 mm long and 7.0 to 13 mm wide. Color, inner surface —            Marginal Zone — Red-Purple Group 63C. Middle Zone —            Red-Purple Group 63C, with an Orange-White Group 159D            central longitudinal stripe. Basal Zone — Red-Purple Group            63C, with an Orange-White Group 159D central longitudinal            stripe. Color, outer surface — Red-Purple Group 63C, with an            Orange-White Group 159D central longitudinal stripe from            base to apex. Margins — Indented. Shape — Obovate. Apex —            Obtuse to emarginate. Base — Cuneate. Texture, inner and            outer surfaces — Smooth.-   Reproductive organs:    -   -   Stamens.—Quantity — Approximately 80, on average, arranged            around the styles. Anthers — Shape — Reniform. Dimensions —            2.0 mm long and 1.0 mm wide, on average. Color —            Greyed-Yellow Group 162A. Pollen — Absent. Filaments — Color            — Greyed-Purple Group 184D. Length — 6.0 mm.        -   Pistils.—Quantity — Average; approximately 40. Stigmas —            Size — Less than 1.0 mm long and 1.0 mm wide. Location —            Inferior in position to anthers. Color — Greyed-Yellow Group            161D. Styles — Length — Approximately 5.0 to 7.0 mm long.            Color — Greyed-White Group 157B, with intonations of            Greyed-Purple Group 184D. Ovary — Dimensions — 8.0 mm long            and 6.0 mm in diameter. Color — White Group 155C.        -   Receptacle.—Shape — Urn-shaped. Dimensions — Approximately            8.0 to 11 mm high and 7.0 to 10 mm wide. Color —            Yellow-Green Group 144A. Texture — Smooth with a few fine            hairs.-   Hips and seed formation: Not observed.

Comparisons With the Parents

The new rose plant may be distinguished from its seed parent, an unnamedRosa hybrida seedling, by the following combination of characteristics:

-   -   1. ‘KORaroma05’ exhibits fewer flower petals than the seed        parent.    -   2. ‘KORaroma05’ exhibits smaller flowers than those of the seed        parent.    -   3. ‘KORaroma05’ exhibits pastel pink flowers, whereas the seed        parent exhibits darker pink flowers.

The new rose plant may be distinguished from its pollen parent, anunnamed Rosa hybrida seedling, by the following combination ofcharacteristics:

-   -   1. ‘KORaroma05’ exhibits pastel pink flowers, whereas the pollen        parent exhibits white flowers.    -   2. ‘KORaroma05’ exhibits smaller flowers than those of the        pollen parent.    -   3. ‘KORaroma05’ exhibits a moderately long shelf life as a        potted plant, whereas the pollen parent exhibits a short shelf        life as a potted plant.

Comparison With the Most Similar Rosa Cultivar Known to the Inventor

For a comparison, several physical characteristics of the Rosa hybridavariety ‘KORdatiffi’ (not patented in the United States; Community PlantVariety Office grant number 31768), a rose variety from the sameinventor, are compared to ‘KORaroma05’ in Chart 1.

CHART 1 Characteristic ‘KORaroma05’ ‘KORdatiffi’ Petal count. 25 petals.Approximately 30 to 40 petals. Petaloids. 8 petaloids. Approximately 30to 40 petaloids. General tonality of the Red-Purple Group N66A. RedGroup 62B. flower, at anthesis. Fragrance. Strong. None.

That which is claimed:
 1. A new and distinct variety of rose plant named‘KORaroma05’, as described and illustrated herein.